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revision 1.1586 by jmc, Tue Jan 31 17:12:24 2012 UTC revision 1.1626 by jmc, Sun Mar 18 23:29:55 2012 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o momentum:
8      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
9        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
10        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
11    
12    checkpoint63k (2012/03/17)
13    o model/src:
14       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
15         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
16       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
17         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
18    o model/src: solve_*diagonal.F
19       - replace division with multiplication by inverse (similar to original version)
20         update output of AD exp. global_ocean.90x40x15.
21       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
22         to enable the use of the vectorized & differentiable solve_tridiagonal.F
23       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
24         vertical advection (to get solve_tridiagonal tested in AD mode).
25    o pkg/seaice: ECCO-CLIVAR merge:
26      1. seaice AREA relaxation
27         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
28         * runtime flag: SEAICE_tauAreaObsRelax
29      2. modified global mean cost imbalance code: CPP option
30          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
31    o another iteration on solve_*diagonal.F
32       Make choices independent of AUTODIFF
33       Default will be the adjoinable vectorized version.
34       Alternative choices are:
35       * non-adjoinable original version with low memory footprint:
36         #define SOLVE_DIAGONAL_LOWMEMORY
37       * still adjoinable but does not vectorize (k as inner-most loop):
38         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
39    o testreport
40     - add option to use a home made wrapper around "make"
41     - remove MITGCM_IEEE env. variable (no longer active)
42    o pkg/shelfice
43     - improve computation of friction velocity for velocity dependent
44       exchange coefficients: include velocities into SHELFICEBoundaryLayer
45       block to average velocities vertically
46     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
47    o Modify diagonal solvers, now three versions (upon request):
48      #ifndef SOLVE_DIAGONAL_AUTODIFF
49        1. default version (dating back a while ago)
50      #else /* def SOLVE_DIAGONAL_AUTODIFF */
51      # ifdef SOLVE_DIAGONAL_KINNER
52        2. adjoinable version with k-innermost loop (G. Forget)
53      # else
54        3. adjoinable vectorized version of 2.
55      # endif
56      #endif /* SOLVE_DIAGONAL_AUTODIFF */
57      All flags are currently set within routines, but could/should be moved to CPP-options.
58      Array bounds for 1. are as before, for 2.,3. cover the entire domain
59      (could be changed for 1. too).
60    o verification/lab_sea (fwd):
61      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
62        use 7 categories (except hb87), new solve4temp params (except salt_plume),
63        constant salinity (=4) or variable salinity (salt_plume) done through
64        SItracer.
65    o pkg/seaice:
66      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
67      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
68         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
69        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
70        SEAICE_freeze got retired) but already better than previously with
71        SEAICE_freeze=123456.7 deg.C;
72      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
73        (safer multi-threaded setting); always set SEAICEuseEVP;
74      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
75        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
76        stop if multiple specifications for the same coeff; make sure default
77        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
78    o pkg/obcs:
79      - allow to switch to upwind 1rst order advection scheme for the advective
80        flux computation at the open-boundary; disabled for adjoint built.
81    o pkg/ptracers:
82      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
83      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
84      - add parameter to decide when to start a tracer; use internal flag to
85        know which tracer to step-forward; switch this internal flag at the top
86        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
87        for adjoint built.
88    o pkg/seaice:
89      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
90      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
91      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
92    o pkg/ecco:
93      - fix writing of output file DiagnosCost_ClimSalt/Theta
94        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
95    o pkg/seaice:
96      - add missing initialisation of COR_ICE array in dynsolver.F
97      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
98        compiled either way, and is tested in all exps (multidim was only tested
99        in lab_sea ad before).
100      - cosmetic change to prepare for future addition of ITD. no change to results.
101        no defaults change.
102      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
103      - by lack of adequate verification experiments, I further used custom versions
104        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
105        should be correct.
106      - avoid recomputations in ad.
107    o array initialisation in adjoint mode:
108      1) pkg/mom_common/mom_calc_ke.F:
109        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
110        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
111        part this initialisation is gone, resulting in Floating Point Exception
112        (caught by open64 compiler with debug option).
113      2) model/src/convective_weights.F
114        set output convectCount over the full array range (instead of doing
115        an update): this fix a similar issue when called within recomputation (adjoint)
116        which could by-pass the initialisation (normally done in the caller S/R).
117    o pkg/seaice:
118      - final version of turbulent flux params, as agreed at MIT ice meet:
119           SEAICE_mcPheePiston (default is ~ 0.000875)
120           SEAICE_mcPheeTaper (default is 0.)
121           SEAICE_frazilFrac (defualt is 1.)
122           SEAICE_mcPheeStepFunc (default is false)
123      - changes results at trunction error level
124      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
125    o added pkg/frazil:
126      - see frazil_description.tex for details
127      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
128    o pkg/shelfice/shelfice_thermodynamics.F
129      - fix exponents for velocity dependent exchange coefficients: change
130        from 2/3(=0) to 0.66666666666666667
131      - move computation of velocity dependent exchange coefficients into
132        separate loop, so that it applies to both thermodynamics
133      - move some divisions by constants out of loops
134    
135    checkpoint63j (2012/02/16)
136    o pkg/seaice:
137      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
138      - SItracer:  added run time params, and allow coupling to ocn salinity.
139    o pkg/seaice: remove (almost) all divisions by constants within loops
140      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
141      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
142      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
143      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
144    o pkg/seaice :
145      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
146        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
147      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
148      - add permanent SItflux diag that corresponds to TFLUX but includes
149        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
150      - allow activation/testing of a fix for suspected missing term in
151        ocn-ice heat budget (to be confirmed). To test this, you want to
152        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
153        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
154      - no change in results, fwd or ad.
155    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
156      - switch to variable freezing point.
157           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
158      - bug fix : the sublimation term that was missing is now activated.
159           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
160      - bug fix : flooding sign term for SIsal0.NE.0.
161           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
162    o pkg/seaice:
163      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
164        is now the default, and the old default constant freezing point is recovered
165        with SEAICE_tempFrz0    = -1.96,
166             SEAICE_dTempFrz_dS = 0.,
167      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
168      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
169      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
170        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
171      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
172        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
173      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
174        seaice_growth r149 for legacy branch (no results change).
175      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
176        from I. Fenty).
177      - results did not change except for global_ocean.cs32x15, mostly due to the
178        switch to variable freezing point (see above item for detail).
179    o pkg/thsice:
180      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
181        seawater freezing in thsice_calc_thickn (not used).
182    o pkg/seaice: turbulent flux term specification via run time params.
183      - replace CPP switches with run time switches to facilitate testing
184      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
185                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
186      - added runtime parameter : SEAICEturbFluxFormula
187      - move Mcphee constants to SEAICE_PARAMS.h
188      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
189                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
190                 remove seaice_summary call (moved to seaice_init_fixed)
191      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
192        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
193      - seaice_summary.F : add missing report of read turbulent flux term set up
194                           and SITRACER.
195      - seaice_check.F : check range; inform and stop if retired CPPs are used
196                         (incl. SEAICE_AGE).
197      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
198             CPP switch, same computation as before for the different options.
199      - change results at the truncation level.
200    o pkg/seaice:
201      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
202        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
203        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
204      - update verification/*/input*/data.seaice:
205        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
206        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
207        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
208        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
209    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
210      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
211        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
212        difference in results only due to machine truncation.
213      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
214        MaykutPolySatVap; keep MIN_LWDOWN.
215      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
216      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
217        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
218    o pkg/salt_plume:
219      - isolate saltPlumeFlux array exch into a specific S/R called from
220        do_oceanic_phys.F
221      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
222    o verification:
223      - move untested set-up to MITgcm_contrib/verification_other.
224    o pkg/seaice:
225      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
226    o pkg/seaice:
227      - seaice_solve4temp.F (keeping results unchanged):
228        * add 2 future run-time params to select which saturation vapor pressure
229          formula is used and how post-iteration fluxes are set.
230          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
231        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
232          the linearized expression to stay consistent with tsurf finding.
233      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
234        can be < 0.
235    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
236      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
237        conductive heat flux F_c , and add it explicitly when updating tsurf as
238        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
239        so that now F_ia has a consistent meaning through the entire routine.
240        This causes differences at truncation level: update output of fwd exp.
241        global_ocean.cs32x15.seaice.
242  o pkg/seaice:  o pkg/seaice:
243    - lots of editing/cleaning in seaice_solve4temp.F + better documentation    - lots of editing/cleaning in seaice_solve4temp.F + better documentation
244      of arrays, sign/direction of fluxes; no effect on results.      of arrays, sign/direction of fluxes; no effect on results.

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